Malicious PDF — malware analysis report

Static analysis result for SHA-256 348d9cb76928ba24…

MALICIOUS

PDF

50.4 KB Created: 2020-09-14 10:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 658d194967dd7f160a61ddc084675f1d SHA-1: 4a66ade94b33fe131d28451ad177eae1c07ab54b SHA-256: 348d9cb76928ba24e4476c5467ec3f13c596cbc07a5e6f255b136dec50f652f3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=monster+hunter+generations+ultimate+armor+sets+gallery In PDF document text
    • http://pejefa.achievewe.org/uploads/1/3/2/7/132740930/rogebapinatibo_bodebumirodi.pdfIn PDF document text
    • http://files.michelsphotos.com/uploads/1/3/0/9/130969819/6647722.pdfIn PDF document text
    • http://files.pilgrimadventures.com/uploads/1/3/1/4/131406864/4465506.pdfIn PDF document text
    • http://magibiwo.carolsuereader.org/uploads/1/3/1/3/131380344/fezegekofedurov.pdfIn PDF document text
    • http://lelivel.missbrittanyteaches.com/uploads/1/3/1/8/131857631/8a59e568538e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/1e4819_0b0b318890df452eabe866a45a5552dd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05301a_e81fd732d56a4053b0295edefcd64247.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8127dd_5e0ab3ff59da457a991bdb273c329b04.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/353d00_65d39a1b03de4a4b910cce0152d675a3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/42213937956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/ziwozaperarap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/81367081695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1681/3735/files/netgear_cg3000dv2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/messenger_lite_apk_latest.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 5208 bytes
SHA-256: cefbb66af93deb50747d3be84d9c5a3bf507c01a52411f2d548bf8b25c4e2eb7
font_01_sfnt_off00008c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 15568 bytes
SHA-256: fbe64fa4d20c4c48d88f18536f9b85b17acc90bed9d6f3fb95479dbd3fe0f50d

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